12/28/2011 03:51 EST | Updated 02/27/2012 05:12 EST

Vehicle flips off Montreal overpass injuring 2

Two people are dead after a truck flipped off a west-end Montreal overpass and onto railway tracks where it was hit by a train.

The victims, a man and woman in their 50s, were inside the vehicle driving west along Sainte-Anne-de-Bellevue Boulevard near the entrance to Highway 20, just after 2 p.m. Wednesday, when the truck went over the edge of the overpass, Montreal police said.

"A train in motion collided with that pickup truck on the track," Montreal police spokesman Andre Leclerc told reporters.

Jeremy Nickerson was on a Via Rail train from Toronto when he heard a loud crash.

“It sounded like we were dragging something under the train,” he told CBC News. “At first, I thought it might have been ice or the like … Someone came on the intercom and said there’s been an accident.”

The announcement told passengers a vehicle had left the road and fallen onto the track and was hit by the train, he said.

Police speculated poor visibility and slippery roads may have played a role.

"Weather may be one of the factors because it was windy, it was snowing at the time," Leclerc said.

It is unknown whether the people were killed when the truck plummeted onto the tracks or by the collision with the train. No one on the train was injured.

Via Rail said trains coming into Montreal from Ontario will be affected for several hours.

Just after 4 p.m., Nickerson said Via Rail announced it was bringing in another engine to move the train from the tracks. No train passengers were injured.